<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card>
            <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
            <!--步骤条-->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <!--左侧tab-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top">
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>

                        <el-form-item label="商品价格" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品重量" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品数量" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>

                        <el-form-item label="商品分类" prop="goods_cat">
                            <el-cascader
                            expand-trigger="hover"
                            :options="catelist"
                            :props="cateProps"
                            v-model="addForm.goods_cat"
                            @change="handleChange">
                            </el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!--表单item项-->
                        <el-form-item
                        :label="item.attr_name"
                        v-for="item in manyTableData"
                        :key="item.attr_id">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox 
                                border
                                :label="cb"
                                v-for="(cb,i) in item.attr_vals"
                                :key="i"></el-checkbox>
                                
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item
                        :label="item.attr_name"
                        v-for="item in onlyTableData"
                        :key="item.attr_id">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <el-upload
                        :on-success="handleSuccess"
                        :headers="headerObj"
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture">
                        <el-button size="small" type="primary">点击上传</el-button>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <quill-editor v-model="addForm.goods_introduce">
                        </quill-editor>
                        <el-button class="addFuwen" type="primary" @click="add">添加文本</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!--图预览-->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
        <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                //商品所属分类数组
                goods_cat:[],
                //图片数组
                pics:[],
                //商品详情描述
                goods_introduce:'',
                attrs:[]
            },
            catelist:[],
            cateProps:{
                label:'cat_name',
                value:'cat_id',
                children:'children'
            },
            manyTableData:[],
            onlyTableData:[],
            //上传图片地址
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            previewVisible:false,

            addFormRules:{
                goods_name:[
                    {required:true, message:'请输入商品名称', trigger:'blur'}
                ],
                goods_price:[
                    {required:true, message:'请输入商品价格', trigger:'blur'}
                ],
                goods_weight:[
                    {required:true, message:'请输入商品重量', trigger:'blur'}
                ],
                goods_number:[
                    {required:true, message:'请输入商品数量', trigger:'blur'}
                ],
                goods_cat:[
                    {required:true, message:'请选择商品分类', trigger:'blur'}
                ]
            }
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        async getCateList(){
            const {data:res} = await this.$http.get('categories')
            if(res.meta.status !== 200){
                return this.$message.error('获取商品分类数据失败')
            }
            //console.log(res.data)
            this.catelist = res.data
        },
        handleChange(){
            //console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length !== 3){
                this.addForm.goods_cat = []
            }
        },
        beforeTabLeave(activeName, oldActiveName){
            //console.log(activeName, oldActiveName)
            if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
                this.$message.error('请选择商品分类')
                return false
            }
        },
        async tabClicked(){
            if(this.activeIndex === '1'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
                if(res.meta.status !== 200){
                    return this.$message.error('获取动态参数列表失败')
                }
                //console.log(res.data)
                res.data.forEach(item => {
                    item.attr_vals=item.attr_vals.length=== 0 ? [] : item.attr_vals.split(' ')
                })
                this.manyTableData = res.data
            }else if(this.activeIndex === '2'){
                const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
                if(res.meta.status !== 200){
                    return this.$message.error('获取静态属性列表失败')
                }
                console.log(res.data)
                this.onlyTableData = res.data
            }
        },
        //处理图片预览
        handlePreview(file){
            this.previewPath = file.response.data.url
            this.previewVisible = true
        },
        //处理图片移除操作
        handleRemove(file){
            //1获取将要删除的图片临时路径
            const filePath = file.response.data.tmp_path
            //2.从pics中找图片对应索引值
            const i = this.addForm.pics.findIndex(x => x.pic === filePath)
            //3.调用数组splice,把图片信息对象从pics中移除
            this.addForm.pics.splice(i, 1)

        },
        //监听图片上传成功的事件
        handleSuccess(response){
            //console.log(response)
            //1.拼接得到一个图片信息对象
            const picInfo = {pic:response.data.tmp_path}
            //2.将图片信息对象push到pics数组中
            this.addForm.pics.push(picInfo)
        },
        //添加商品文本
        add(){
            this.$refs.addFormRef.validate(async valid => {
                if(!valid){
                    return this.$message.error('请填写必要项')
                }
                //lodash  cloneDeep(obj)
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
                //处理动态参数
                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals.join('')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                //处理静态属性
                this.onlyTableData.forEach(item => {
                    const newInfo = {
                        attr_id:item.attr_id,
                        attr_value:item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs
                //商品名称发起添加商品
                const {data:res} = await this.$http.post('goods', form)
                if(res.meta.status !== 201){
                    return this.$message.error('添加商品失败')
                }
                this.$message.success('添加商品成功')
                this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length === 3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>
<style lang="less" scoped>
.el-checkbox{
    margin:0 5px 0 0!important;
}
.previewImg{
    width:100%;
}

</style>